In _______ 1940s the computer was made to work as _______ useful machine.
| A．the; an | B．the; a | C．/; a | D．/; an |
Kathy opened her mouth, expecting a candy and then looked puzzled______ she got nothing.
| A．when | B．although | C．so | D．Once |
------ Kate and Lucy are twins.
------ Oh, I ______ why they looked so alike.
| A．wonder | B．have wondered |
| C．was wondering | D．had wondered |
A lunar probe-Chang’e-2_______ as much as 2 tons was sent up into space on October12010.
| A．weighing | B．weighed |
| C．to be weighed | D．being weighed |
------What will you do during the coming winter vocation?
------ I don’t know, but it’s about time ______ something.
| A．I’m deciding | B．I’ll decide |
| C．I’d decided | D．I decided |
As the crowd rushed towards the gate, several people got______.
| A．knocking down | B．knocked off |
| C．knocking on | D．knocked over |