______ correct printing, envelopes should be loaded into the printer paper tray face down.

admin2022-10-20  10

问题 ______ correct printing, envelopes should be loaded into the printer paper tray face down.

选项 A、To ensure
B、Ensuring
C、Being ensured
D、Had been ensured

答案A

解析 语法题。to十动词原形,在此处表示目的,作状语,故选A。
转载请注明原文地址:https://kaotiyun.com/show/FLZd777K
0

随机试题
最新回复(0)