Cucumber contains a high content of vitamin C which is five times higher than _____of watermelon.
| A． ones | B．it | C． that | D．those |
They ______ that wild animals should be left in the wild and not used for entertainment.
| A．discussed | B．argued | C．quarreled. | D．talked |
Please tell me ______you want me to say.
| A．what is it that | B．what it is that | C．how is it that | D．how it is that |
There______ more than one student who_______ late this morning.
| A．have been, was | B．has been, were | C．were, was | D．was, was |
Nowadays, most people，in order to keep fit，prefer walking to driving ____necessary.
| A．if | B．unless | C．in case | D．as if |
The expo will be held in Shanghai, _____a lot of advanced technology will be shown for the first time.
| A．where | B．which | C．when | D．from which |