单选题
阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选出能填入空白处的最佳选项。

Issac Newton was a famous scientist (科学家). He{{U}} (41) {{/U}}a-bout the laws of nature (自然界，本性){{U}} (42) {{/U}}than any other scientist in his time.
He learned by looking closely at things and by{{U}} (43) {{/U}}hard. He was always in deep{{U}} (44) {{/U}}.
{{U}} (45) {{/U}}he was a wise (聪明的，明智的) scientist, he felt that he was never too old to learn. He thought (想) that what he knew was like a drop (滴) of knowledge (知识，知道){{U}} (46) {{/U}}.
He also said, "Man should not amuse (逗乐){{U}} (47) {{/U}}by finding a smooth (平滑的) pebble (鹅卵石) or pretty (漂亮的，相当) shell (外壳，泡弹){{U}} (48) {{/U}}a boy does. He must learn more by swimming{{U}} (49) {{/U}}the sea."
The more you learn, the more there is{{U}} (50) {{/U}}to be learned.

A、

[A] heard
B、

[B] read
C、

[C] knew

【正确答案】 C

【答案解析】根据上下文，以及常识，牛顿应该是knew about the laws of nature而不是heard。

A、

[A] less
B、

[B] more
C、

[C] much

【正确答案】 B

【答案解析】同上题的判断依据，应该选[B]more。

A、

[A] learning
B、

[B] doing
C、

[C] studying

【正确答案】 C

【答案解析】study hard刻苦钻研，最符合牛顿的身份。

A、

[A] think
B、

[B] thinking
C、

[C] thought

【正确答案】 B

【答案解析】空格应该填入一个名词或代词，thinking是动名词，符合题意。

A、

[A] As
B、

[B] Because
C、

[C] Though

【正确答案】 C

【答案解析】though表示转折、让步。

A、

[A] sea
B、

[B] lake
C、

[C] river

【正确答案】 A

【答案解析】what he knew was like a drop of know ledge sea。意思是他所知道的只不过是知识海洋里的一滴而已。

A、

[A] himself
B、

[B] ourselves
C、

[C] themselves

【正确答案】 A

【答案解析】这句话是牛顿的一句名言。这里应该填入与man相一致的 himself。

A、

[A] if
B、

[B] like
C、

[C] as

【正确答案】 C

【答案解析】as和like都有“像”的意思；但like是介词，后面只能接名词或代词。As是连词，后面一般接从句。

A、

[A] in
B、

[B] On
C、

[C] at

【正确答案】 A

【答案解析】in the sea，在海洋里。

A、

[A] yet
B、

[B] already
C、

[C] still

【正确答案】 C

【答案解析】still，仍然。句子意思是说，你学到的越多，那么你要学的也就越多。