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1. ______ the problem whether men with cats would be more than attractive than men on their own, the researchers carried out two surveys to find the truth.
A. Having addressed B. To do with C. To solve D. To cope
2. We Chinese are willing to give help to______ is friendly to us, which is the principle that we stick to all the time.
A. whoever B. them C. those D.that
3. The head of WHO said that pandemic threat to humanity required a common approach, but the United States______to participate.
A. objected B. opposed C.rejected D.refused
4. “Since you have got the opportunity, you______as well take advantage of it,” my teacher said.
A. should B. must C. can D. may
5. Experts predict that the situation______better if the vaccine against the novel coronavirus is available in one year.
A. has turned B.will be turned C.will turn D.turns
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