They kept trying _____ they must have known it was hopeless.
举一反三
- They kept trying ________ they must have known it was hopeless. A: If B: because C: when D: where
- Sorry, I’m late. I ____________you waiting. A: should not keep B: should not have kept C: should have kept D: must not have kept
- In order to use the normal distribution for interval estimation of m when s is known, the population A: must be very large B: must have a normal distribution C: can have any distribution D: must have a mean of at least 1
- I didn’t think our meeting was ____-you must have known I would be there.
- These magazines ______ in the library for a long time. A: have kept B: had kept C: have been kept D: were kept