With five professional hands ______ them next month, these students are sure to complete the experiment on time.
A. helping B. help
C. to helping D. to help
_______ is announced in today’s newspaper, we have launched another man-made satellite.
A.That B.Which
C. As D. What
No sooner ______ the room than we realized we to take our books.
A.had we left ; forget B.we had left ; forget
C. we had left ; forgot D. had we left;forgot
When you’re learning to play the piano, _______ a good teacher makes a big difference.
A. have B. having
C. and have D. if have
—Is the manager available tomorrow afternoon?
—No, he is busy. Otherwise he ________ the meeting.
A. had attended B. would have attended
C. would attend D. could have attended
— Mum, where is my ball? I remember I put it here yesterday.
— You _______ it in the wrong place.
A. must put B. might put
C. might have put D. should have put
