Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

You look upset. ____ you ____?

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

How many times ____ you ____ that international conference?

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

I ____ English for five years. I study it at school.

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

You can have your book back now. I ____ it.

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

I ____ for my math textbook all day, but I ____ it yet.

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

It is not easy at all to get a good job without any ____ qualifications.

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.