（1）What---you---when it began to rain?A are,doing B did,do C

（1）What___you___when it began to rain?A are,doing B did,do C were,doing D were,do （2）I was watching TV___the thief came into the house.A when B while C for D because（3）School closed___the day because of the death of Chairman Mao.A to B for C on D off（4）___maths is not easy,I want to study it well.A Although B But C If D So（5）He was___silence all the afternoon,because he had a sore throat.A in B with C on D of