Generally speaking, when _____ according to the directions, the medicine had no side effect．
| A．take | B．taken | C．to take | D．to be taken |
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 |