问题

__ with some research materials, he decided onthree possible approaches in his experiment

A:As
B:Since
C:If
D:The, a

正确答案是：

同类题型

下列各句中，没有语病的一项是（）

_______man we met just now is ________driver.

My sister was writing an e-mail _______ I was watching TV at this time yesterday.

The dog took a piece of meat and .

Though a typhoon is on the way，people are still looking forward _____ the outdoor concert．