【题目】__________ (explore) of the solar system began in the 19th century.

【题目】I don’t like the beach __________ (pack) with holiday markers.

【题目】Doctors need 50 healthy __________ (voluntary) for the diet.

【题目】My parents always exercise six the morning.

【题目】The university welcomes __________ (apply) forms from excellent students.

【题目】—________is it from your home to school?

【题目】—Can Jill and Jane swim?

【题目】Karen likes music that she can sing _______ .

【题目】—What are you doing tomorrow, Jane?

【题目】Mike likes going shopping with his friends in his __________ time.