I can't say which wine is the best－it's a(an)________ of personal taste．

A．affair

B．matter

C．event

D．variety

Don't be too hard on him．After all, it was for the first time ________ he made such a mistake．

A．that

B．when

C．since

D．before

By the end of 2007, about half a million people had flooded into the city, ________ up around 10 percent of its total population．

A．make

B．made

C．making

D．to be made

________, I could not memorize the text．

A．However hard did I try

B．However hard I tried

C．However I tried hard

D．However I had tried hard

－Why are you so late?

－I got stuck in the traffic jam, or I ________ earlier．

A．arrived

B．had arrived

C．would arrive

D．would have arrived

Mount Wuyi is such an attractive place of interest ________ everyone likes to visit．

A．that

B．as

C．which

D．what

With some books badly needed ________, she hurried to the bookstore．

A．buying

B．bought

C．to buy

D．buy

Excuse me, I can't ________ you．Could you please slow down a bit?

A．look up to

B．keep up with

C．live up to

D．come up with

－Is it safe enough to stand here, Mom?

－No, come a bit ________ to me, honey．

A．close

B．closely

C．closer

D．more closely

The news has spread all over the world ________ the satellite Chang'E Ⅰ has been successfully sent up to circle the moon．

A．that

B．which

C．whether

D．what