It is essential that all these figures ______ twice.
A: must be checked
B: be checked
C: is checked
D: will be checked
A: must be checked
B: be checked
C: is checked
D: will be checked
举一反三
- It is essential that all these figures () twice. A: being checked B: are checked C: checked D: be checked
- It is essential that all these figures___twice. A: be checked B: are been checked C: being checked D: to be checked
- They packed and （）of the hotel． A: checked out B: checked over C: checked in D: checked into
- They packed and ______________ of the hotel. A: A. checked in B: B. checked out C: C. checked on D: D. checked by
- They ______ at the hotel in less than half an hour after their arrival at the airport. A: checked out B: checked on C: checked up D: checked in