—When ________ the first practical light bulb ________?
—In 1879.
A.does; invent B.is; invented C.did; invent D.was; invented
We flew over ________ Pacific to Calgary, Canada. Then we went to a ski resort by ________ bus in the Canadian Rockies.
A./; a B.the; the C.a: the D.the; /
I tried to call my dad, but the line was ________. So I sent him an email.
A.deaf B.alive C.dead D.free
Many people were left homeless ________ the flood.
A.with the help of B.in the form of C.in the shape of D.as a result of
________ you start doing your homework now, you will finish it before dinner.
A.If B.Unless C.Before D.Until
Tom was not listening carefully, so he ________ to hear what the teacher said.
A.began B.succeeded C.failed D.came
