John felt very embarrassed ________ he entered the government hall.
A. for the moment B. the first time
C. for the first time D. at the moment
We live too far from the city to get a strong TV ________.
A. sign B. symbol C. mark D. signal
It was last Saturday ________ we visited the History Museum.
A. which B. and C. where D. that
I suggested that the problem _____as soon as possible.
A. referred to being solved B. referred be solved
C. referred to be solved D. referred should be solved
When ________ to the market, these products were very popular.
A. introducing B. introduced
C. introduce D. being introduced
His English, ______ used to be very poor is now excellent.
A. which B. that C. it D. whom
