My grandfather loves keeping pets．He said a pet could help a person feel______.A．more nervous

Three days later, word came ________our country had sent up another man-made satellite.

dogs ______ a bone, and a thirdruns away with it

couldn’t. The line was busy.

Since no one really knows what effects the GM food might have _____ us humans, many countries think that they should be cautious _____ this new technology