After we had waited for__2hours，the bus finally arrived.

Production department 2 A: Machine hours B: Labour hours

It takes ______ to produce the first tank top by using 3D printer. A: 28 hours B: 14 hours C: 7 hours D: 2 hours

The boss expected the writer to work ________ every day. A: A. 2 hours B: B. 3 hours C: C. 4 hours D: D. 5 hours

how long will they stay in the museum of Terracotta Army? A: 1 hour B: 2 hours C: 3 hours D: 2.5 hours

The second stage of laborina primiparawithout epidural anesthesia should last nomore than A: 1 hour B: 2 hours C: 3 hours D: 1.5 hours

How long would the patient be asked to lie on his/her back without pillow after Lumbar Puncture? () A: for at least 0.5 hours B: for at least 2 hours C: for at least 3 hours D: for at least 4 hours E: for at least 1 hours

Two groups of people are compared in the third study. They are people______. A: with less than5 hours of sleep a night and with 7 to 9 hours of sleep B: who slept 4 hours a night and who slept 4 hours for 2 nights C: with less than 4 hours of sleep a night and with 7 to 9 hours of sleep D: with less than 5 hours of sleep a night and with 8 hours of sleep

He spends 2 hours in reading very day.

According to a recent survey, on any given day, _______, 3 hours watching television and 2 hours in miscellaneous activities like eating, dating, bathing, etc.