-What's up? You look worried.
Well,I_____on the problem for 5 hours but I haven't got a single clue.
A. have worked B．Worked
C. will work D. have been working
A book I read last year,_______name l can't remember, changed my idea about time.
A. which B.that C.whose D. what
l'm afraid that I can't attend Tom's wedding party_______next weekend.
A. to be held B.being held C.held D. is to be held
-May I have_____break, mum?
Did you have_____ short one an hour ago?
A. the; the B.a;/ C.the;／ D.a;a
Be careful when you cross the road in rush hours so as to avoid by a car．
A．being knocked down B． knocking down
C．to be knocked down D． to knock down
—Next week I will go to a job interview．Will you give me some suggestions?
—Smiling is a great way to make yourself ．
A．stand out B．turn out C．work out D．pick out
