问题

The research lack _____sevidence, and therefore, its conclusions are doubtful. [ ]

A: solid
B: fierce
C: severe
D: potential

正确答案是：

同类题型

Look at _______ skirt. Ibought it for Mother on Mothers’ Day, isn’t it nice — Oh, what _______ nicepresent!

Word came ________ Chang’eⅡ was Launched successfully and carried out the task as expected. [ ]

The hazy weather has ________ for almost a week in North China. —Yes, and the government has tried to solve it.

I got up late this morning, _____, I missed the chance of the interview.

He_____notpayunlessheispunishedtopay