ten hours’ drive, we came to ________ is called a green house, through the glass wall of ________, we saw lots of green plants.

Excuse me! You can’t take photos here. Look at the sign. It says “No photos.”—Sorry, I__________ see it and I __________ do it.

There is no ________ over (在……上方) the river. We need to cross it by boat.

, once ____ positive for Ebola, the deadly disease, will receive free medical treatment from the government.

The class _______ 80 students is hard to manage. [ ]