Дано числа: 3; 0,5; -4; 0,8. Яке із цих чисел є цілим, але не є натуральним?

Use the verbs given in brackets in the proper tense and voice forms?

1. The uncomplicated turbojets (to call) straight jets.

2. The turbojets (to suit) to high altitude operation.

3. All the contracts on engines delivery (to sign) by 3 o'clock yesterday.

4. You'll have your copy soon, the contract (to type) now.

5. The helicopter (to test) next year.

6. (To discuss) the plan?

7. Our planes (to provide with) the new engine by the end of this month.

8. The pulse-jet engine (to scrutinize) first seriously by American military

and technical men in the late spring of 1944.

9. Disk and rim failures in turbo-jet engines (to overcame) now by the

application of such methods as improved gas seals, the incorporation of

methods for cooling the disk, and improved metallurgy.