It is high time we ______ awareness of environmental protection.
A. promoted B. would promote C. shall promote D. had promoted
How can they learn anything useful ______ they spend all their spare time playing online games?
A. while B. unless C. although D. when
______ is it that metals plays such an important part in our daily life?
A. Why B. What C. Where D. When
He is strict and kind-hearted teacher, ______ the children respect but are a bit afraid of.
A. which B. that C. one which D. one whom
They have the right to check ______ the will is valid(有效的), of course.
A. whether B. why C. when D. how
. I am arranging for Mr. Smith, one of our inspectors, to come and ______the damage caused to the building.
A. attempt B. assess C. accuse D. appear
