We find impossible to finish the work in a week.
| A．one | B．that | C．it | D．this |
—Be quiet, Mr Smith is coming.
—Don’t worry. It ＿＿＿ be him. Mr Smith is much taller.
A. mustn’t B. must C. can’t
Be quick, ＿＿＿we’ll be late for school.
A. and B. or C. so
Susan joined an art club at ＿＿＿age of six and paints well.
A. the B. an C.a
—Can you speak English, Mr Wang？
—Yes, but only＿＿＿
A. little B. a little C. a lot
—How often do you exercise?
—＿＿＿
A. Two B. Twice C. Second