第13课时
( A )1.(2018·滁州二模)It’s not always safe to pay over the Internet，________ you should be careful.
A．so B．after
C．because D．as soon as
( B )2.(2018·芜湖二模)We’ll stay at home ________ it rains tomorrow.
A．and B．if
C．but D．so
( A )3.(2018·马鞍山一模)Give me a chance，________ I’ll prove it to you.
A．and B．till
C．though D．while
( A )4.(原创题)—Look! It’s raining heavily. ______ take a raincoat with you?
—Well，I’ll take one right now.
A．Why not
