There’s no way of knowing why one man makes an important discovery another man, also intelligent, fails.
| A．since | B．If | C．as | D．while |
.--Where is your father?
--He ________to Shanghai. He has ________ Pudong since last Friday.
| A．is going, gone to | B．has gone, been in | C．has been, been in | D．has gone, been to |
If you want to open a file, please __________ the icon.
| A．click on | B．hit on | C．put on | D．touch on |
You can see the Little Mermade in ________.
| A．Britain | B．China | C．Denmark | D．America |
The sign 
means “______”.
| A．Parking | B．Danger | C．Turn left | D．Crosswalk |
I can sing English songs and I can ______ sing Japanese songs.
| A．too | B．also | C．only | D．just |