用所给动词的适当形式填空（每空一分，满分10分）

小题1:After a big snowfall, the town ________ (lie) clean and quiet.

小题2:Our manager would like to have you _______ (give) a speech at the meeting.

小题3:We are told _________(not throw) waste paper everywhere.

小题4:We have been good friends ever since we _______ (meet) on the first day of school this term.

小题5:____­­­­_____ (judge) from what he said, he must be an honest man.

小题6:Finally they got their child _________ (interest) in study.

小题7:Can you wait for me for another second? I __________ (finish) my work.

小题8:After the floods, some survivors __________( trap) at the top of the houses.

小题9:It was the second time that the artist _______________ (come) to this mountain village.

小题10:We should love and respect our parents who ______ always _________ (concern) about us and have done so much for us.

据报道，美国夏威夷联合天文中心的科学家发现了一种新型氢粒子，这种粒子是由3个氢原子核（只有质子）和2个电子构成。对于这种粒子，下列说法中正确的是（  ）

A．是氢的一种新的单质

B．是氢的一种新的同位素

C．它的组成可用H₃表示

D．它比一个普通H₂分子多一个氢原子核