The room ___________. It’s a real mess.
A. must be cleaned up
B. must cleaned up
C. must clean up
My friend Tom ____ a great idea! We’re going to make a pen pal website.
A. came up with B. gave away C. took after
My grandpa would like the radio.
A. to listen B.to listen to C. listening to
Liu Lei is good at English. She studies English by English movies.
A. watch B. watching C. to watch
He used _______short, but he is tall now.
A. to be B. to C. is
It took me _______ hour to finish my homework.
A.a B. an C. the
