We decided to ask Peterson to come with us he knew the road quite well.
| A．while | B．when |
| C．even though | D．as |
The poster says that a writer and poet ___ to give us a talk on English next week.
| A．is | B．are | C．be | D．will be |
How this kind of plant can be ____ in a special way is still unknown to us.
| A．kept away | B．kept out | C．kept alive | D．kept off |
If I ___ free tonight, I'll go to the cinema with you.
| A．am | B．was | C．will be | D．be |
Edison had built a chemical lab of ___ when he was very young.
| A．himself | B．him | C．itself | D．his own |
This is the only one of the books on space ___.
| A．that has been written | B．that have been written | C．which have been written | D．which has been written |