问题

___ the office, the foreign visitorswere shown round the teaching building.

A:Having shown
B:Showing
C:Has shown
D:Having been shown

正确答案是：

同类题型

Those who suffer from hearttrouble will find they get _______ from this medicine

My sister has never played tennis beforeThis is the first time she __________ to play

She paused _____ over the unfamiliar word but soon continued

Could you tell me _______in your hometown in winter— Sure.

The city has improved a lot I came here a few years ago.