________they visited the Science Museum，they showed great interest in everything they saw.
| A．The first time | B．For the first time | C．At first | D．At the first time |
I asked him to come at seven o’clock, but he __________. It’s already eight o’clock．
| A．didn’t show off | B．didn’t show up |
| C．hasn’t shown up | D．hasn’t shown off |
He has promised to _________ the matter and will give the workers a satisfactory answer.
| A．look into | B．look after |
| C．look at | D．look for |
Rather than ________ on a crowded bus , he always prefers ________ a bicycle.
| A．Riding;ride | B．ride;ride | C．ride; to ride | D．to ride; riding |
When he came back, his wife was found _________.
| A．dying | B．dead | C．died | D．death |
Every minute should be made the most of ________ our lessons well.
| A．to study | B．studying | C．to studying | D．studied |