问题

untry has already sent up 3 unmanned spacecraft,the most recent at the end oflast March.

A:was launched
B:beinglaunched
C:has beenlaunched
D:having beenlaunched

正确答案是：

同类题型

下列各句中，没有语病的一项是（）

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The residents, _______ had been damaged by the earthquake, were given help by the Red Cross.

ade a mistake, though I didn’t ________

Now that the problem is solved, why not have a break—What nice ________!