Rather than ________ on a crowded bus , he always prefers ________ a bicycle.
| A．Riding;ride | B．ride;ride | C．ride; to ride | D．to ride; riding |
Each of the students _____ a Chinese-English dictionary.
| A．have | B．has | C．there is | D．there are |
Mathematics ____the language of science.
| A．are | B．are going to be | C．is | D．is to be |
Half of his goods ____ stolen the other day.
| A．are | B．were | C．is | D．was |
That they were wrong in these matters _____ now clear to us all.
| A．is | B．was | C．are | D．were |
Although the first part of the book is easy， the rest ______.
| A．are difficult | B．has proved difficult |
| C．is supposed difficult | D．have been found difficult |