Cho dạng đúng của các động từ trong ngoặc đơn sau đây
11. We could have gone out if the weather (not be) ______________so bad.
12. If the book (not be ) ______________expensive, I'll buy it.
13. You would be very surprised if he (return) ______________.
14. I'll go out if it (not rain) ______________.
15. They wouldn't come to the party if you (not invite) ______________them
12. If the book (not be ) ______________expensive, I'll buy it.
13. You would be very surprised if he (return) ______________.
14. I'll go out if it (not rain) ______________.
15. They wouldn't come to the party if you (not invite) ______________them