Experiments of this kind ___in both the U．S and Europe well before the Second World War
A．had conducted B． have conducted
C．have been conducted D. had been conducted
The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.
A. average B. ordinary C. common D. usual
It is the first time that he ______ here and now it is high time that he ______ around.
A. come; should be shown B. has come; was shown
C. came; was shown D. has come; be shown
My spoken English was poor and you can imagine what great difficulty I had ______ myself understood.
A. make B. to make C. made D. making
It is bad for a man to smoke in public places where smoking is not allowed.
A. method B. impression C. behavior D. attitude
1. If you go by ______ train, you can have quite a comfortable journey, but make sure you get ______ fast one.
A. the; the B. /; a C. the; a D. /; /
