There’s no way of knowing why one man makes an important discovery another man, also intelligent, fails.
A. since B. if C. as D. while
What we all know is that new technology is being ________to almost every industrial process.
A．applied B．attempted
C．acquired D．arranged
It was not until last week_______ she found________ she thought was quite mistaken.
A．when；that B．that；that
C．when；what D．that；what
—Brad was Jane’s brother!
— _____ he reminded me so much of Jane!
A. No doubt B. Above all
C. No wonder D. Of course
—Hurry up! Alice and Sue are waiting for you at the school gate.
—Oh! I thought they________ without me.
A．went B．are going
C．have gone D．had gone
You have to be accurate in this job，because a small mistake can make a big ________.
A．difference B．difficulty
C．trouble D．change
