What a pity! I missed meeting my boss at the airport because my car was ______ in the traffic jam.
| A．broken up | B．kept away | C．held up | D．kept up |
----- Where did you ______ our chemistry teacher?
----- It was in the supermarket ______ I saw him.
| A．come to, where | B．come across, that | C．come across, where | D．come to, that |
Yuan Longping makes ____ possible to produce more crops in the same fields with this special strain of rice
| A．that | B．it | C．this | D．it that |
Please ______ the traffic regulations.
| A．observe | B．take | C．see | D．look |
Only then ______ how much damage had been caused.
| A．had she realized | B．she realized | C．did she realize | D．she had realized |
Before he came , I’d finished _______ the whole book.
| A．to read | B．to have read | C．reading | D．read |