-Where have you been recently? -I __ ___ in Hangzhou on business for a week last month.
_______ he didn’t help me with my work. Instead, just _______.
The little girl _______ out at night alone.
--- Would you like to join us?--- Sorry, but I am not _______ as any of you.
He made _______ an excuse for his failure in order to avoid _______.
It was _______ he does _______ makes his students enthusiastic about school.