Into the dark apartment _______, who was quite surprised when everyone shouted “Happy Birthday”.
| A．did David walk | B．David walked | C．David did walk | D．walked David |
I ______ go to the cinema, but I haven’t had time since I entered senior high school.
| A．used to | B．was used to |
| C．happened to | D．was able to |
_______, ice can be changed into water and water can be changed into steam.
| A．Heat | B．Heating |
| C．To heat | D．Heated |
--- How do you want to post it?
--- It is only printed matter;_______ mail is OK.
| A．general | B．ordinary |
| C．necessary | D．partial |
---Do you know what a computer system ________ ?
---Hardware and software. Am I right?
| A．consists of | B．consists in |
| C．is consisted of | D．is consisted in |
Michael’s new house is like a huge palace, _______ with his old one.
| A．comparing | B．compares |
| C．to compare | D．compared |