Without facts, we cannot form a worthwhile opinion for we need to have a factual knowledge ________ our thinking.
| A．which to base on | B．which to be based on |
| C．on which to be based | D．on which to base |
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It ________ I arrived at the station ________ I found the train was delayed.
| A．was until; that | B．wasn’t until; that | C．was until; when | D．wasn’t until; when |
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No teachers are permitted ________ in the classroom or in the office.
| A．smoke | B．smoking | C．to smoke | D．smoked |
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---I’ll be away for about two days. Would you mind taking care of my little dog?
---________.
| A．Yes, it’s my pleasure. | B．Yes, I’ll do it well. |
| C．No, I’ve got no time. | D．No, I’d be happy to. |
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--- Could you fetch me my glasses from the kitchen?
---__________ .
| A．It’s a pleasure | B．At your service | C．It doesn’t matter | D．That’s my pleasure |
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You can’t complain of being lonely__________you don’t make an effort to meet people and make friends with them.
| A．while | B．when | C．whenever | D．though |