-What do you think we can do for our aged parents?
-You __________ do anything except to be with them and be yourself.
| A．don't have to |
| B．oughtn't to |
| C．mustn't |
| D．can't |
It is not how much we do but how much love we put into what we do _______ matters.
| A．who | B．which | C．whom | D．that |
Under no circumstances _________ lend Paul any money.
| A．you should | B．you shouldn’t | C．should you | D．should you not |
------ Why does the lake smell terrible?
------ Because large quantities of water _________.
| A．have been polluted | B．has polluted |
| C．have polluted | D．has been polluted |
I ________ through that bitter period without your generous help.
| A．couldn’t have gone | B．didn’t go | C．would go | D．hadn’t gone |
By the time Jack returned home from America, his son __________ from college.
| A．graduate | B．has graduated | C．had graduated | D．had been graduated |