用所给动词的适当形式填空。

86. Mr Wu is ready     ▲    (help) his students at all times.

87. How sweet the music     ▲    (sound)! I have never heard a better piece.

88. I’m sorry that I     ▲    (wait) for an important phone call. Go without me.

89. I hear her father    ▲    （be）to Japan once.

90. Gangnam Style    ▲    (consider) as one of the most popular songs in 2012.

76.____________ 77.____________   78.____________   79.____________   80.____________

81.____________ 82.____________   83.____________   84.____________   85.____________

86.____________ 87.____________   88.____________   89.____________   90.____________