The two brothers look so much alike that it is difficult to .
| A．tell them from | B．tell from them |
| C．tell them apart | D．tell apart them |
– What do you think of the book ?
-- Oh, excellent. It’s worthy ______ a second time.
| A．to read | B．to be read | C．being read | D．to being read |
It was some time _____ we realized the truth.
| A．when | B．until | C．since | D．before |
Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will enjoy it.
| A．to see | B．to be seen | C．seeing | D．seen |
—What does this sentence mean ?
--- It seems to me that it ________.
| A．doesn’t make sense | B．doesn’t have sense | C．doesn’t make meaning | D．doesn’t be meaningful |
Don’t leave matches or cigarettes on the table within ____ of little children.
| A．hand | B．reach | C．space | D．distance |