Evdence has been found through years of study ________ children's early sleeping problem likely to continue when they grow up．

A．why

B．how

C．whether

D．that

The headmaster will not permit the change in the course, nor ________ it a thought．

A．does he even given

B．he even gives

will he ever give

D．he will even given

It was 80 years before Christopher Columbus crossed the Atlantic ________ Zheng sailed to East Africa

A．when

B．that

C．after

D．since

Before you quit your job, ________ how your family would feel about your decision．

A．consider

B．considering

C．to consider

D．considered

Sales director is a position ________ commuincation ability is just as importane as sales

A．which

B．that

C．when

D．where

We're having a meeting in half an hour．The decision ________ at the meeting will inf the future of our company．

A．to be made

B．being made

C．made

D．having been made

Food stupplies in the flood-stricken area ________．We must act immediately before there's left．

A．have run out

B．are running out

C．have been run out

D．are being run out

Sam has been appointed ________ manager of the engineering department to take ________ p; ace of George．

A．/,/

B．the,/

C．the the

D．/, the

________ to work overtime that evening, I missed a wonderful film．

A．Having been asked

B．To ask

C．Having asked

D．To be asked

A computer can only do ________ you have instructed it to do．

A．how

B．after

C．what

D．when