As your instructor advised ,you ought to spend your time on something ______researching into .
Every year _______ foreign visitors come to Beijing to pay a visit to the places of interest.
---- What _______ the number of the students in your school?---- About two thousand. A number of them _______ from the same junior school.
On seeing the _______ scene, the little girl was so _______ that she burst out crying.
The organizers want to complete their plan ahead of _______ . So we must work harder.
---- John and I will celebrate our fortieth wedding anniversary next mouth.---- Oh, _______ !