2019年mpacc考试英语真题——连词1264

{01}24. The Niagara Waterfalls, ______ is shaped like a semicircle, are 670meters wide, and fall 56 meters in an awesome white sheet of water.

A.what

B.where

C.the largest of which

D.in which

解析：略
本题选C。
{02} Bad habits, ____formed, are difficult, and sometimes impossible to shake off.

A.once

B.before

C.until

D.unless

解析：略
本题选A。
{03}________ the little boy looked after his sick uncle a whole year moved us all.

A.What

B.That

C.When

D.Which

解析：略
本题选B。