Question

【題目】語法填空

Koalas, native to the Australian wilds, initially proved difficult to keep alive in zoos, because koalas eat nothing but the leaves of the eucalyptus tree(桉樹). Zoos provided them ____【1】______ an unlimited supply of eucalyptus leaves. One zoo even planted eucalyptus trees _____【2】____(make) sure that the koalas had a continual supply of fresh leaves. However, koalas kept in cages always died within a year of their ___【3】_____(arrive) at the zoo.

Eventually it was discovered that eucalyptus trees less than five years old sometimes produce a kind of acid in their leaves. Taking in small quantities of this acid ___【4】____ (be) fatal to the koalas. In their natural habitat, the koalas’ senses tell them ____【5】____ eucalyptus trees have dangerous leaves, and they simply move on to other trees until they find leaves _____【6】____ are safe to eat. But in zoos, when their keepers unknowingly were giving them leaves with acid, the koalas ____【7】____(leave) with only two options: eat the poisonous leaves ____【8】___ starve. Either option was fatal to the ____【9】_____(trap) koalas.

Fortunately, today’s zoos use special tests to distinguish between poisonous eucalyptus leaves and safe ___【10】______, and now koalas are eating well and living an easy life in zoos.

Answer 1

【答案】

【1】with

【2】to make

【3】arrival

【4】is

【5】which

【6】which/that

【7】were left

【8】or

【9】trapped

【10】ones

【解析】

【1】with 固定搭配：provide...with...“提供給某人某物”，故填with。

【2】to make 此處動詞不定式表示目的，“為了確保……”，故填to make。

【3】arrival their是形容詞性物主代詞，修飾名詞，故填arrival。

【4】is 此處是動名詞短語作主語，后面的謂語動詞用單數形式，故填is。

【5】which 句意：Koalas的感覺告訴我們哪一種桉樹有危險的樹葉。此處用which引導的賓語從句，表示“哪一種”。

【6】which/that 此處考查定語從句。leaves作先行詞，指物，定語從句缺少主語，故填which/that。

【7】were left 此處表示：Koalas只被留下兩個選擇。根據句意可知用一般過去時態(tài)的被動語態(tài)，故填were left。

【8】or 句意：吃有毒的樹葉還是餓死。表示選擇，故填or。

【9】trapped 表示“被困的樹袋熊”。此處是過去分詞作定語，故填trapped。

【10】ones 考查代詞。此處用ones代替leaves，故填ones。

【知識歸納】

1.動名詞或動名詞短語作主語后面的謂語動詞用單數形式。Smoking harms your health.吸煙有害你的健康。比如第44小題is 此處是動名詞短語作主語后面的謂語動詞用單數形式，故填is。

2.一組構詞 動詞---名詞

arrive---arrival；survive---survival；propose---proposal；try---trial.

3.provide sb. with sth./ provide sth. for sb.提供給某人某物；offer sb. sth./offer sth. to sb.提供給某人某物。