I was wandering ____ the streets when I caught sight of a tailor's shop.

A. across                          B. through      C.by                               D.past

Nobody knows it ____ me.                

A. except for               B. except that    C. besides       D. but

To understand the grammar of the sentence，you must break it______ into parts． 

A．down          B．up          C．off           D．out

 2. “_____ when does the pub stay open？”  “About midnight.”

    A. Since. B. Before

    C. Until. D. After

The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /

They were surprised that a child should work out the problem they themselves couldn’t．

A．once B．then C．while D．if

 11. The chemistry teacher required the students _______ more attention _______ the lab clean.

A. to pay, to keep     B. to paying, to keeping  C. to pay, to keeping      D. paying, keeping

—You know. Bob is a little slow ____ understanding, so…

— So I have to be patient ______ him.

A. in ; with        B. on; with        C. in; to         D. at; for

The museum is ___ far ____ it will take us half an hour to get there by bus.

A. such... that           B. as...as                    C. so...that            D. so … as

Would you tell me ____ way I should take?  

A. what      B. that     C. which    D. whose