（）, I didn’t know how to use the machine.
A: At beginning
B: At first
C: At start
A: At beginning
B: At first
C: At start
举一反三
- The new staff didn’t know how to use the system _________ I explained it to him yesterday.
- If you don't know how to use the machine, you can _____ (寻求帮助)
- The mason ______ I didn't do this exercise is I didn't know how to do it. A: why...because B: why...that C: for...that D: that...because
- There’s a new machine in your company ,but you don’t know how to use it , so you may ask：________
- 3. What’s the matter with the woman? A: She didn’t know how to operate the computer. B: She didn’t know how to get to the store. C: She didn’t know how much the computer was. D: She didn’t want to buy the computer.