Помогите пожалуйста! Поставьте глагол в правильную форму: The scientists (to try) to find out the aetiology of this disease now. :)

the papers this year. I (try) to catch the waiter’s attention for about 15 minutes now. She (study) English for a year and (learn) many words and expressions. I (not hear) about him since yesterday. I (look) for him since I finished my lesson but I (not find) him. I (be) in his office and to the laboratory but he isn’t there. ‘Hello, Sven. You (see) Alex yet?’- ‘No, I (not be) to the shop floor today. I (talk) on the phone to our clients all morning.’ I (be) up here since about six. I (wander) around for hours. I (come) to you to invite you for a ride in the car. I expect these young men (inform) you who I am. I really don’t know what you (do) there all this time. And that’s where they (stay) ever since. They (struggle) with this problem for about a month and they (solve) it at last. They (discuss) the case for hours but (be) unable to come to any decision. You (listen to) gossip. The things you (hear) are quite impossible. I (wait) here since 10 o’clock. Nobody (look) in here. I (tell) you so for years but you never (pay) any attention. She (do) shaping since September and her figure (improve) remarkably. You (ask) him this question for a week and still he (not answer) you.

The first time i (see) Tom when he was on the first day of my secondary school.
He (talk) to some friends and i read a book in our school hall.When i (hear) his voice i (like) it very much. Two months later we (begin) going out with each other.After finishing school Tom (go) to Canada to study law. This year he (come) back home for the Christmas holidays.

the documents (to check) at the passport control area.
my salary(to pay) into my account.
these souvenirs (to make) by hand.
in this supermarket a 10 pen cent discount (to give)to regular customers.
a iot of money (to spend) on advertising last year.
new computers(to deliver)to the shop tomorrow.
the scientist (to award) the nobel prize for his discovery.
our clients (to invite) to the trade show next month.
these problems (to discuss) at the meeting yesterday.

My mother (to buy) a nes suit last week.
How many books you (to read) this week?
Listen! Who (to play) the piano in the next room?
She (to go) to the University , when I (to meet) her yesterday.
She usually (to do) her homework at home , but now she (to do) it at the library.
Yesterday I (to buy) a new watch as I )to lose) my old one.
We should play the game in the open air if the weather (to be) better.
We (to catch) the train if we hurry up.
The patient (to be) better you had called the doctor much earlier.
They ( to translate) this text at the next lesson.

(kill) and thousands (injure)

3. The town of Plumfield (badly damage) by a tornado.

4. Cars (pick up) and (throw) a long way away.

5. The tops of cars (tear off)

6. A lot of houses (destroy)

7. A lot of trees (push over)

помогите пожалуйста!

раскрыть скобки,поставить глагол в правильную форму.и перевести.
the documents (to check) at the passport control area.
my salary(to pay) into my account.
these souvenirs (to make) by hand.
in this supermarket a 10 pen cent discount (to give)to regular customers.
a iot of money (to spend) on advertising last year.
new computers(to deliver)to the shop tomorrow.
the scientist (to award) the nobel prize for his discovery.
our clients (to invite) to the trade show next month.
these problems (to discuss) at the meeting yesterday.