Present Simple vs Present Progressive

Although Mary has been cooking for many years, she still ______how to prepare Chinese food.

• don't know

• doesn't know

• hadn't known

• knows

The aims of the course ______ me willing to begin.

• make

• makes

• making

• is making

Listen! Somebody ______in the next room.

• sing

• sings

• is singing

• are signing

A)_____life on Mars? B) No, it_____.

• Does/exist/doesn't

• Has existed/exist/had

• Do/exist/doesn't

• Do/exist/don't

Nothing will make him ______back to her.

• to come

• coming

• come

• would come

"This thief ______usually promise to steal again." said Sherlock Holmes.

• won't

• doesn't

• don't

• isn't

Samuel says he's 25 years old, but nobody _______him.

• is believing

• don't believe

• believes

• doesn't believe

The sea _____to those who ______to listen to it.

• speaks/likes

• speaks/like

• speak/like

• speak/will like

We can't disturb him now. He _____.

• operate

• operates

• will operate

• is operating

A) Where is Comrade A? B) He _____tennis.

• plays

• is playing

• play

• are playing