In the spoken English of some areas in theUS, the “r” sounds at the end of the words___.[ ]

Mary, can you help me— Wait a moment.I dinner now.

Mum, I really think Dad should have a break and get relaxed— YesHe _______ too long

下列句子中没有通假字的一句是（ ）

They had to continue _____ their homework after school.