After walking in the Shanghai World Expo for a whole day, my legs ____ under me and I couldn’t walk any farther.
.Mary couldn’t make herself _______ attention to because her classmates made so much noise.
.—Do you like the material? —Yes, it ______ very soft. (MET1994 )
If city noises ______ from increasing, people______ shout to be heard even at the dinner table 20 years from now. (MET1992 )
—What happened to the postman? —I don't know. He______ around here for a long time.
They said good-bye, hardly knowing that they ______again.