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____________ before we leave, the day after tomorrow, we should have a wonderful dinner party.

(A) Had they arrived

(B) Would they arrive

(C) Were they arriving

(D) Were they to arrive

An explosion is a sudden increase in amount __________.

（A） rapid burning causes it （B） to be caused by rapid burning （C） causing its burning to be rapi （D） caused by rapid burning

Correct Answer: D

When people admire his ________ achievements, they seldom think of the frustration he has experienced.

（A） single （B） singular （C） small （D） easy

Correct Answer: B

Early to bed and early to rise（） a man healthy, wealthy and wise.

（A）make

（B）had made

（C）makes

（D）will make

Correct Answer: C