______ you work hard, you’ll succeed some day.

The teacher explained a second time,           the students should have difficulty in doing the experiment.

_____ David showed the report to the public surprised me.

How can they learn anything ______ they spend all their spare time watching television?

You sound ________you have caught a cold.
A. because of      B. even though     C. so that       D as if

Several weeks had gone by____I realized the painting was missing. 

The camera is ____ expensive ____ I can’t afford it.

She treats the boy like that     she were his mother.

Martin and his friends didn’t eat up all the food they ordered, _____ they took the rest away.

I like travelling alone. Icanstaylonger______ Iwish, or just keepmovingalong.