A doctor can expect__________at any hour of the day or night.
| A．calling | B．to call | C．being called | D．to be called |
The students were made ______ the text ten times.
| A．read | B．reading | C．to read | D．to be read |
The chair looks rather hard _______, but in fact it is very comfortable.
| A．to sit | B．to sit on | C．sitting | D．sit |
Nobody knows __________next.
| A．what to do | B．to do what | C．which to do | D．how to do |
It is very important ______ us ________these words.
| A．to, to remember | B．for, to remember | C．for, remember | D．for, remembering |
_______ English well, one must have a lot practice.
| A．For speaking | B．Speaking | C．To speak | D．Speak |