________ there, the southwest desert contains a remarkable variety of plants．

Rarely as it rains

Sometimes it rains

It rarely rains

Although rarely rains

You can use a large plastics bottle, ________ cut off, as a plot to grow flowers in．

its top is

the top of which

whose top

with its top

If you show your respect for your mother' opinions, though you may not ________ them, she will feel ________ to you．

agree; closely

admit; close

share; close

use; closely

The film you'd like to ________ quickly won't be ready until tomorrow．

have develop

have developed

have to develop

have to be developed

Elworth's barn burned down, but they saved what cattle ________ were in the barn．

that

they

there

where

As ________ clear from his manners, he seems to be much of a scholar．

being

is

if

though

While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man's understanding of color．

a;/

a; the

/; the

the; a

He never does anything wrong．He should be the ________ to blame．

least

last

worst

best

Reading provides the mind only with materials of knowledge; it is thinking that makes ________ we read ours．

that

what

which

it

We have done things we ought not to have done and ________ undone things we ought to have done．

left

leaving

will leave

to leave