单选题 Li Lei works in a farm tool factory. He and five
of his friends are very interested in singing. So they have {{U}} {{U}}
1 {{/U}} {{/U}}a singing group which is called Happy Birds. They sing
{{U}} {{U}} 2 {{/U}} {{/U}}songs both in Chinese and in foreign
languages. They sing very {{U}} {{U}} 3 {{/U}} {{/U}}. The other
workers and people {{U}} {{U}} 4 {{/U}} {{/U}}the villages
around really like to hear them {{U}} {{U}} 5 {{/U}} {{/U}}. Now
New Year's Day {{U}} {{U}} 6 {{/U}} {{/U}}here soon. The Happy
Birds have been asked to {{U}} {{U}} 7 {{/U}} {{/U}}at different
places. They'd {{U}} {{U}} 8 {{/U}} {{/U}}to go to all of them.
{{U}} {{U}} 9 {{/U}} {{/U}}one friend has too much work and
{{U}} {{U}} 10 {{/U}} {{/U}}may have to give up his holidays.
The Happy Birds can't sing without him.