The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.
| A．puzzled；puzzling；puzzling | B．puzzled；puzzling；puzzled |
| C．puzzling；puzzling；puzzled | D．puzzling；puzzled；puzzling |
It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.
| A．issue | B．item | C．magazine | D．copy |
.The current political _____ of our country is favorable for foreign investments.
| A．climate | B．weather | C．state | D．occasion |
The store had no more red shoes _____, so Mary chose brown ones instead.
| A．in demand | B．in store | C．in need | D．in stock |
. Don't go too far into the sea, children, or the waves will _____ you off your feet.
| A．flow | B．cut | C．press | D．sweep |
. You will get to the church more quickly if you take this _____ across the fields.
| A．track | B．passage | C．method | D．journey |