【题目】—Have the parts we need for the copying machine arrived yet?
—I ordered them last week, but something ________ them up.
A.holds
B.is going to hold
C.will hold
D.is holding

【答案】D
【解析】考查时态。句意：—我们需要的复印机零部件送来了吗?—我上周就已定货，但不知什么事阻碍了。根据上一句的提问可知，上周定的货还没有到，说明有事情正在阻止这些货物的到来，故要用现在进行时态，故选D。