It is human activities on the earth that are to _______ global warming.
A. be blamed for B. to blame for C. take charge of D. be responsible with
I like the house with a beautiful garden in front, but I can’t afford______．
A．one B．this C．it D．that
His glasses, _____he was like a blind man, were broken.
A. with which B. with it C. without which D. without it
Experiments of this kind in both the U．S．and Europe well before the Second World War．
A．have conducted B．have been conducted
C．had conducted D．had been conducted
So _____ in the darkness that he didn't dare to move an inch.
A. he was frightened B. was he frightened C. frightened he was D. frightened was he
The police tried to get some clues from the suspect, but he remained______.
A．silent B．quiet C．calm D．secret
