The sunlight is white and blinding,           hard-edged shadows on the ground.

throwing

being thrown

to be thrown

考查非謂語動詞。句意：陽光熾白炫目，在地上投下濃重的陰影。主語The sunlight和throw是主動關(guān)系，因此要用現(xiàn)在分詞表主動，此處是現(xiàn)在分詞短語作狀語。故選A項。

It's really           to know that there're only seven bones in giraffes' long necks.

amazingly

amazed

amazing

amazement

考查形容詞辨析。句意：知道長頸鹿的長脖子上只有7塊骨頭，真是令人驚訝。分析句子結(jié)構(gòu)可知，is是系動詞，空格處需填形容詞作表語。主語是It,指物，表示“令人驚訝的”，應(yīng)填amazing。故選C項。

Like other animals, we are          until we know it is safe to relax.

on purpose

on fire

on guard

on duty

考查介詞短語辨析。句意：像其他動物一樣，我們在知道安全的時候才放松警惕。A.on purpose 故意；B. on fire著火；C.on guard 警惕；D.on duty值班。結(jié)合后文we know it is safe to relax，可知我們在知道安全的時候才放松警惕。故選C項。

I found _____ convenient to shop online at home .

it’s 

that

it

that was

考查強(qiáng)調(diào)句。句意：我發(fā)現(xiàn)在家網(wǎng)購很方便。這里it指代后面的to shop online。其中的強(qiáng)調(diào)句式是：主語+find it +形容詞+to do，意為主語發(fā)現(xiàn)做某事是...的，故選C。