If you harder, you will fail the exam.
A. not work B. work C. don’t work D. won’t work
The rivers will become dirtier and dirtier ______ we take action to protect them.
A. since B. if
C. until D. unless
24 Hours is _____one-hour news round-up on CCTV. It starts at 23: 00 every night.
A. the B. a C. an D. /
— Shall we watch Korean TV dramas together?
— ________. They will kill me.
A. They are worth watching B. I am a fan of TV dramas
C. I’d rather watch some D. It’s a waste of time
— I hope I can take part in the game show Who is Still Standing and win something.
— Stop daydreaming. You will win nothing ____you spend a few months preparing for it.
A. since B. unless C. if D. because
—Can I go to the concert with you tomorrow, Mum?
—OK, if all your homework ________.
A. is done B. will be done C. has done D. does
