The instructions on the bottle are really _______. I can't understand them at all.
A. encouraged B. various
C. confusing D. standard
If you ______ any problems when you arrive at the airport, give me a ring.
A. come up with B. set about
C. run into D. put aside
Some insects ______ the color of their surroundings to protect themselves.
A. take in B. take off C. take on D. take out
Before the sales start, I make a list of ______ my kids will need for the coming season.
A. why B. what C. how D. Which
The difficulty which we had ______ with the local people has been removed.
A. communication B. communicated
C. communicating D. to communicate
While working in the country, the students ______ a lot of knowledge about plant.
A. looked up B. picked up C. put up D. called up
