[ Grammar ]
Recently, a new vaccine against measles __________.
A. has been developed
B. had been developed
C. had developed
D. was developing

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will, be going to, would like toTenses and ArticleArticle the or zero article (-)Prepotitions-ing form and the to-infinitiveInversion + Passive VoiceClausePast Perfect & Past SimpleSubject Verb Agreement & Subjunctive MoodReflexive Pronouns & Modal VerbsOther quiz:
Grammar › ViewThe man ___________ you spoke to yesterday is here.
A. who
B. which
Modal Verbs › View
Rewrite the sentence using modal verbs:
It is not possible for us to travel to the moon.
A. We can’t travel to the moon.
B. We might travel to the moon.
C. We should travel to the moon.
D. We don’t need to travel to the moon.
Present Perfect Tense › ViewHave you finished your work _____________?
A. already
B. just
C. yet
Modals › View
——- we have lunch in that restaurant?
A. will
B. shall
C. may
D. could
E. must