用所给单词的适当形式填空小题1:I had a difficult time _________ (study) Eng

用所给单词的适当形式填空
小题1:I had a difficult time _________ (study) English
小题2:My sister is _________ (thin) than me.
小题3:John always listens to the old man in _________ (silent).
小题4:Let’s welcome these _________ (hero) to our school.
小题5:My brother plays the guitar very ________ (good).