根据句意及首字母填写单词。

小题1:Do you know the c____ answer to the math problem?

小题2:He was so t_____ that he drank plenty of water in one breath.

小题3:The man is good at playing Chinese c______

小题4:Many foreign t______ come to China every year.

小题5:The Red Army s________ in arriving in Gansu Province in 1936.

患者于肌内注射青霉素后突然晕厥，皮肤湿冷．脉搏不可扪及，抢救时首先应用（）。