When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

Some of her best loved photos are ___ display in this exhibition. [ ]

Will ______be _______to pick me up at 8:00am. at the airport on Sunday? —–No problem. You can call me at any time.

Be quiet! The students ______ a physics test in the next room.

Excuse me, could you tell me ? — There is an e–shop on the third floor. You can repair it there.