John couldn’t finish his words ______ something had struck his throat.
| A.though | B.as though | C.when | D.since | 
—I got an A in my English final exam. I really can’t believe it myself!
 —. I know how hard you’ve worked for it.
| A.You can’t miss it | B.You deserve it | 
| C.You’ll take it | D.That’s too bad | 
Global warming sometimes feels like a problem that’s very far away from our lives,
 only the government needs to worry about.
| A.everything | B.something | 
| C.anything | D.nothing | 
is known to all is that Beijing and Zhangjiakou have been trying to co-host the 2022 Winter Olympic Games on Nov 3, 2013.
| A.What | B.Which | C.It | D.As | 
—Was it 11 o’clock you begin doing your homework last night?
 —Yes, things are always eating up my precious time.
| A.that | B.while | C.until | D.when | 
There are 61 million “left-behind children” in central and western China,
the adults have to seek jobs in the cities.
| A.who | B.which | C.when | D.where |