Without proper lessons, you would __________ a lot of bad habits when playing the piano.
| A．pick up | B．catch up | C．keep up | D．give up |
---I was riding along the street and all of a sudden, a car cut in and knocked me down.
--- You can never be ______ careful in the street.
| A．much | B．very | C．so | D．too |
A dozen ideas were considered _____ the chief architect decided on the design of the
building.
| A．because | B．before | C．whether | D．unless |
Scientists are trying to develop a special material, ________ they will make use of in
spacecraft.
| A．it | B．one | C．that | D．what |
He was absent for two weeks, so he had a lot of homework to ________.
| A．make up | B．put up | C．take up | D．pick up |
--- Do you think he will do me a favor?
--- As far as I know, he is the last one to help others. He _______ be prepared to give you a hand, though.
| A．might | B．must | C．can | D．should |