__________ the story is short and there are few new words in it, it is difficult to understand.
| A．Though | B．When | C．For | D．If |
— What do you think of this book?
— Good indeed. It ________ many problems we have in our study.
| A．memorizes | B．covers | C．impresses | D．talks |
— I can’t get through to the general manager’s office.
—The line is busy. Someone ________ the telephone.
| A．must have used | B．could use | C．could have used | D．must be using |
－Hi, Bruce. Here’s a letter for you.
－Thanks. I wonder_________.
| A．who that letter was from | B．who was from that letter |
| C．who was that letter from | D．who from that letter was |
If by any chance Peter comes to us, please ask him to leave a _________.
| A．letter | B．sentence | C．message | D．notice |
－Where’s Lisa, Eric?
－She __________ to the library.
| A．goes | B．had gone | C．has gone | D．would go |