It's difficult （） this work today.

单项选择题A spokesperson for Solaris International announced that the company would （） on strengthening investor relations in South Americ

a.A. repeat
B. surpass
C. franchise
D. concertrate

单项选择题Excuse me, （） is the way to the nearest supermarket

A. where
B. which
C. why
D. who

单项选择题—Is this your key, John —No, it isn't, （） is over there.

A.I
B. Me
C. My
D. Mine

单项选择题Dentimax's latest marketing campaign for their Little Teeth （）is aimed at the parents of infants and small children.

A. target
B. products
C. commerce
D. technician