问题

The scientists claimed( 声称) to ___ a jet plane that uses atomic energy as propelling _, but they can’t produce an atom of evidence to prove it. [ ]

A: design; power
B: have designed; power
C: design; force
D: have designed; strength

正确答案是：

同类题型

I have no pencils _____ pens, but Mary and Andy have some.

We are not twins, but we are very much _____. People often mistake one for another.

traffic in the city was ____ today,so Mary got home earlier than usual.

Our government is doing _______ to protect theenvironment.—That’s great.

The children went home from the grammar school, their lessons_____for the day [ ]