The new policy allows a couple to have a second birth____either is an only child.
A. if only B. on condition that
C. unless D. until
----Fancy meeting you here, Lucy! I never thought you visit us today.
----Sorry, I forgot to tell you I was coming. I hope you don't mind me____.
A. calling in B. pulling in
C. breaking in D. dropping in
If you go to the wildlife park, you will find the places there more dangerous than commonly_ __.
A. supposing B. suppose C. to suppose D. supposed
一I'm afraid I have to leave now, for you see, he is waiting for me.
----Well, if you_ , at least wait till the heavy rain stops.
A. could B. should C. must D. might
He says difficulty you meet with in your work, you can turn to him for help
A. how B. however C. what D. whatever
CT is really useful invention, with which doctors can find out what's wrong with a patient more easily.
A. A; a B. The; an C. The; a D.A ;the
