_____is compulsory by law for a citizen to undertake military service.
| A．That | B．There | C．This | D．It |
相关试题
Listening to loud music at rock 
concerts ______ hearing loss in some teenagers.
| A．have caused | B．has been caused | C．is caused | D．has caused |
The coach _______ the team to make even greater efforts.
| A．inspires | B．behaves | C．demands | D．hopes |
The fact that she was foreign made ______ difficult for her to get a job in that country.
| A．so | B．it | C．that | D．much |
She is very_______ about her success, though she’s achieved a lot.
| A．careful | B．certain | C．modest | D．anxious |
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