THE AIR-HOSTESSES WERE BEGINNING ...OUR LUNCH WHEN THE PLANE BEGAN...
7. The air-hostesses were beginning ...our lunch when the plane began to shake .
A.serving
B. to serve
C. to have
D. A&B are right
7. The air-hostesses were beginning ...our lunch when the plane began to shake .
A.serving
B. to serve
C. to have
D. A&B are right