[ Modals ]
A pilot _____ wear a uniform when he’s at work.
A. has to
B. must

Random Topics:
Prepositions of MovementPassive Voice - Present TensesArticles & QuantifiersAdjectives and VocabularyInfinitives and GerundsPresent Perfect Tense and Simple Past TenseCan vs CouldAdjective / Noun + to InfinitiveFuture Simple TenseThe Future Simple TenseOther quiz:
Grammar › ViewWhy don’t we _________ a backup plan in case something bad happens?
A. plan
B. make
C. come up with
D. create
Grammar › View
We …………………… wash our hands before meals.
A. have to
B. don’t have to