Before _____, the machine must be checked.
A: being used
B: using it
C: being used to
D: using
A: being used
B: using it
C: being used to
D: using
举一反三
- If a better material______, the strength of the part would have been in- creased. A: had been used B: had been using C: being used D: using
- In addition to ______ in industry, laser can be applied to operations. A: use B: been used C: being used D: using
- Before _____, the machine must be checked.
- __________ is one rule of the usage of comma. A: Being used to separate items B: Being used in a direct speech C: Being used at the end of a sentence D: Being used to show feeling
- 【单选题】 It is no longer ________. A: what it used to be B: what it was used to being C: what it used to being D: what it was used to be