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【題目】__________ you may go or stay, at least wait until you get the letter.

【題目】Of all subjects, chemistry seems to be __________ for me to master.

【題目】I can hardly make a __________ on how to deal with this problem.

【題目】Don't make____________same mistake for the second time in____________day.

【題目】He explained again and again in order to make what he did ________.

【題目】As far as we know, safety comes first 　　　　you do.

【題目】Both Lily and Lucy ______________to the party yesterday, but they didn't come at all.

【題目】—Have you finished the book ______________you borrowed from the library?

【題目】Many volunteers ______________food and water to the local people.

【題目】________the things like knives and medicine away in our house so that we can keep childr safe.