Thinking that you know ________ in fact you don't know is a serious mistake.
A.what B.that C.when D.however
His mother did _______ she could ______ the boy.
A.what help B.that help C.what to help D.that to help
_______climber gets to the top first will get a ￥5,000 prize.
A.No matter when B.Whichever C.No matter which D.Whenever
When the news came ___ the war broke out , he decided to serve in the army.
A.since B.which C.that D.because
John invited about 40 people to his wedding, most of are family members.
A.them B.that
C.which D.whom
They overcame some difficulties and completed the work ahead of time, ________ was something we had not expected.
A.that B.which
C.it D.what
