This is an illness that can result in total blindness if_______.
| A．to leave untreating | B．left untreated | C．leaving untreating | D．is left untreated |
. If you head ________ to Beijing , the Summer palace is______ for tourists.
| A．north, the must-see | B．the north, a must-see | C．north, a must-see | D．the north, the must-see |
It’s difficult to _______ a conversation with someone who only says “yes” and “no”.
| A．put up | B．pick up | C．keep up | D．live up |
----- Why does Sara know so much about Angkor Wat?
----- She _________ have been there, or….
| A．must | B．oughtn’t to | C．may | D．can’t |
. Some of the scientists held the point ______ the book said was right.
| A．what what | B．that that | C．what that | D．that what |
Hello. You ________68442936. I’m sorry I’m unable to answer your call right now.
| A．reached | B．have reached | C．are reaching | D．had reached |