Once a schedule is made, only by strictly ________ it, can we avoid putting off till tomorrow what should be done.
| A．arranging | B．presenting |
| C．measuring | D．observing |
The river _____ are covered with trees is very long.
| A．whose bank | B．of which banks | C．whose the banks | D．the banks of which |
-----Tim, please don’t talk in class.
-----Pardon?
-----I _____ talk in class.
| A．tell you don’t | B．tell you not to | C．told you didn’t | D．told you not to |
When Jack arrived, he learned Mary _____ for almost an hour.
| A．had gone | B．had set off | C．had left | D．had been away |
The speaker mentioned some writers and books _____ were known to us.
| A．that | B．which | C．/ | D．who |
-----I called you at about half past eight last night but nobody answered.
-----Oh, I _____ in my office at that time.
| A．will work | B．had worked | C．worked | D．was working |