I have been studying ___ half an hour. a. until ...

[ Prepositions ]

I have been studying ___ half an hour.
a. until
b. since
c. for

Select your answer:
A B C D E

Random Topics:

Past Simple vs Present Simple Perfect Tenses Present and Past Simple Tense BASIC GRAMMAR - PRONOUNS Coordinate Conjunction Essential and Nonessential Clauses Adjectives, Adverbs, and Prepositions Nouns Active and Passive voice Noun Clause

Other quiz:

Present Perfect vs Past Simple Tense › View

I … just … kebab from the Turkey Restaurant around that corner.

A. have / bought

B. haven’t / bought

C. has / bought

D. hasn’t / bought

E. have / buyed

Vocabulary › View

He is valued and appreciated by everyone who knows him.

A. Reliable

B. Loyal

C. Respected

D. Honest

Grammar › View

Read the sentence.

Giant pandas live in the mountain ranges of central china.

Which underlined word should begin with a capital letter?

A.     pandas

B.     ranges

C.     central

D.     china

Tenses › View

All of a sudden Eric was completely lost. All he had with him was his snowboard, some bubble gum and an MP3 player. Eventually, he remembered something … in a movie about using an MP3 player as a compass.

A. was seeing

B. ‘d seen