Fill in the blank with the most appropriate word.
I visited my sister when she ________ in Moscow.

Fill in the blanks with the most appropriate option:Christopher Columbus didn't know where he _______. When he landed he…

Fill in the blank with the most appropriate option.<br>A: Have you written to them?<br>B: Yes, ________ twic…

Choose the correct present perfect or simple past form of the verb from the alternatives given.<br>Yesterday I ___…

Fill in the blank with the most appropriate word.<br>The landlord ____ just rented the apartment when I got there.…

What. . . . . . . . if you press this button?

Fill in the blank with the most appropriate word.<br>A: Were you singing when I came in?<br>B: Yes, I ______…

Water . . . . . . . . from liquid to gas when it . . . . . . . . a temperature of 100°C.

The train . . . . . . . . before we reached the station.