1. I will use the Internet after I …… my computer for viruses.
A. am scanning C. scan
B. will scan D. would scan
2. Save that file on your computer before I…… upgrade the operating system.
A. will upgrade C. could upgrade
B. upgrade D. would upgrade
3. Frank …… he’s own restaurant soon. That’s his plan.
A. is going to open C. will open
B. is opening D. opens
4. …… an emergency, sound the alarm.
A. In case C. In case of
B. But for D. Even if
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