几道英语试题，帮忙解答下，谢谢。

1.How much does it__________to take the online training course?
A.cost B.pay C.give D.spend

选A Sth cost sb some time/money to do sth

2.__________you study hard,you will pass the test.
A.Only if 只要……就 B.If only 要是…多好
C.as soon as D./
选A

3.If you need more information,Please contact us__________telephone or email.
A.in B.on C.by D.for
选C

4.Before__________for the job,you will be required to take a language test.
A.apply B.aoolied C.applying D.to apply
选C

5.__________the rain stop before 12 o'clock,we will have to cancel the game.
A.As B.While C.Since D.Unless
选D

6.The big IT company will__________a new research center in the city.
A.set up B.get up C.break up D.turn up
选A

17.Two assistants will be required to check reporters’ names when they arrive at the press conference.
A) 两位助手要求记者在到达新闻发布会时通报他们的姓名。
B) 两位助手到达新闻发布会时被记者要求通报他们的姓名。
C) 有两位助手检查记者的姓名并通告他们新闻发布会的时间。
D) 要有两位助手在记者到达新闻发布会时核对他们的姓名。
选D
18.A guest paying full fare can invite another guest to join the tour at half price.
A) 支付全额费用的客人，每位可以再带一位客人参加旅游，按半价付费。
B) 支付全额费用的客人，每位需要再邀请一位客人参加旅游，按半价收费。
C) 每位按半价付费参加旅游的客人，必须再找到一位全额付费的客人参加。
D) 支付全额费用的客人，如邀请另外一位客人参加旅游，可退还一半费用。
选A