Generally speaking, _________ according to the directions, the drug has no side effect.
| A．when taking | B．when taken |
| C．when to take | D．when to be taken |
The secretary and principal __________ at the meeting now.
| A．are speaking | B．is speaking |
| C．were making a speech | D．have a speech |
We all think Mr. Smith __________ a new house if more new houses __________.
| A．should be given; are built | B．will be given; will build |
| C．is given; will be built | D．should give; are built |
If better use is __________ of your spare time, you'll make great progress in your study.
| A．spent | B．taken |
| C．given | D．made |
English is difficult __________ well in a short time.
| A．to learn | B．learning |
| C．to be learned | D．learn |
Paul doesn't have to be made __________. He always works hard.
| A．learn | B．to learn |
| C．learned | D．learning |