--- Jack fell off the ladder yesterday，but he is all right now.
---What a lucky dog! He ________himself badly.
| A．should injure | B．might injure | C．should have injured | D．could have injured |
The student, who was ______ to be studying in the classroom, was taken to the police station, which I guess was ______ with the stolen bike.
| A．found; related | B．hoped; linked |
| C．supposed; connected | D．considered; involved |
They ______ on the project for almost one month before I joined them, and now we ______ on it as no good results have come out so far.
| A．had been working; are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
There is a ______ of furniture in the market, which can satisfy all the customers’ demand.
| A．variety | B．number | C．description | D．combination |
—Should I look up the new words each time I come across some?
—No, refer to your dictionary only ______.
| A．where possible | B．when necessary | C．if ever | D．if so |
It is not until ______ that ______.
| A．is a baby kangaroo four months old; he will begin to live outside its mother’s pouch |
| B．is a baby kangaroo four months old; will he begin to live outside its mother’s pouch |
| C．a baby kangaroo is four months old; he will begin to live outside its mother’s pouch |
| D．a baby kangaroo is four months old; will he begin to live outside its mother’s pouch |