— John seems happy, even though his wife left him and he lost his job.
— I think he __________ to put on a brave face.
| A．will try | B．has tried | C．had tried | D．is trying |
_____, I believe, and you will find Tom is very outgoing．
| A．Having a talk with the student | B．Given a talk with the student |
| C．If you have a talk with the student | D．One talk with the student |
from the top of the tower ,the south foot of the mountain is a sea of trees.
| A．Seen | B．Seeing | C．Having seen | D．To see |
—I wonder why Susan looks worried today.
—I’m not sure, but she _____a small accident driving here.
| A．could have | B．might have | C．might have had | D．must have had |
The job requireddid itcareful and brave enough.
| A．who; is | B．whom; was | C．whomever; were | D．whoever; be |
Is this the very material that scientists ______ the 2012 London Olympic Games torch?
| A．used to light | B．are used to lighting |
| C．use to light | D．are used to light |