When I passed the classroom, I heard a girl ________ in it.
| A．sing | B．to sing |
| C．sang | D．singing |
Could you speak in a loud voice so that I can hear you _______________？（ ）
A．quicklyB．happilyC．slowlyD．clearly
Amon ____________ his ship in a big storm when a giant fish came out of the sea．（ ）
A．will sailB．is sailing
C．was sailingD．has sailed
Would you please ____________ the light？ I can't sleep well with it on．（ ）
A．turn onB．turn off
C．turn toD．turn around
Love your parents __________ they are alive． Don't wait until it is too late．（ ）
A．whileB．thoughC．becauseD．unless
The flying squirrel might be one of __________ animals you could meet during the trip．（ ）
A．strangeB．stranger
C．strangestD．the strangest