单项选择题

Three fourthsof the research ______ this year.

A．begin
B．began
C．begins
D．begun
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单项选择题
The branchesof a company are sometimes called ______.
A．subsidiary
B．subsidiaries
C．subsidy
D．subsidies
单项选择题
But for theirassistance, our cooperation would not have made such a great progress ______.
A．soon than whathad expected
B．soon than what was expected
C．sooner thanwhat had been expected
D．sooner than what had expected
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