Henry must have stayed up last night, ________ he looks so tired and sleepy.
| A．for | B．as | C．though | D．since |
. The rocks are very big with _____ of colors on them.
| A．bands | B．marks | C．rails | D．shapes |
. There were no tickets _____ for Friday's performance.
| A．preferable | B．possible | C．considerable | D．available |
. Despite all the evidence to the contrary, the witness _____ that his story was true.
| A．stuck out | B．stood out | C．kept down | D．held up |
In a typhoon, winds _____ a speed greater than 120 kilometers per hour.
| A．assume | B．accomplish | C．attain | D．assemble |
. Professor Smith and Professor Brown will _____ in giving the class lectures.
| A．exchange | B．alter | C．shift | D．alternate |