________ an important decision more on emotion than on reason, you will regret it sooner or later.
| A．Based | B．Basing | C．Base | D．To base |
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_______ has already been pointed out, grammar is not a set of dead rules.
| A．As | B．It | C．That | D．Which |
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You should try to _____ new circumstances as quickly as you can
| A．adopt to | B．apply to | C．devote to | D．adapt to |
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---I’ m sorry, but I didn’t mean__________ out your secret.
---But you know, letting out one’s secret means________ one’ s feelings.
| A．to let; to hurt | B．letting; hurting | C．to let; hurting | D．letting; to hurt |
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He made another wonderful discovery, _______ of great importance to science.
| A．which I think is. | B．which I think it is. |
| C．which I think it. | D．I think which is. |
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The river _______ in the late summer, so we could go across it easily.
| A．dried out | B．dried up | C．dried off | D．dried down |