_____ his knowledge of the mountainous country, John Smith was appointed as our guide.
| A．In spite of | B．On account of | C．Regardless of | D．In place of |
Because of the bad management, this restaurant was not _______ it was 10 years ago.
| A．half as good as what | B．as half good as that |
| C．as good as half what | D．half as good as that |
We can never expect ______ bluer sky unless we stop ______ industrial waste going into _____ atmosphere.
| A．a; the; the | B．the; the; the | C．a; /; the | D．the; /; / |
________that he made an obvious mistake，Jeff went on with his speech.
| A．Not realized | B．Not realizing |
| C．Not to realize | D．Not to have realized |
There is no doubt ________ those who work hard will succeed sooner or later.
| A．if | B．whether | C．why | D．that |
There are many websites，________you can find almost all the necessary information.
| A．where | B．from where | C．when | D．from when |