单选题 When autumn comes, ______ of most trees turn yellow and then fall down.

单选题 He took ______ as to what he should do.

单选题 June 1st is ______ Day all over the world.

单选题 It's such an ______ film that all the students are ______ in it.

单选题 The tall man with a big nose is ______ teacher.

单选题 The fire destroyed all the ______ in the language lab.

单选题 A group of ______ are talking with two ______ over there.

单选题 Don't worry, sir. I'm sure I can run ______ to catch up with them.