Last year the farmer       (喂養(yǎng)) some sheep on his farm.

The lovely       (嬰兒) are sleeping,so we must keep quiet.

He is       (開發(fā)) a new software.

The factory       (生產(chǎn)) plastic bottles.

His goal is to be a (科學(xué)家) .

Some doctors have done a lot of       (研究) to fight the cancer.

The Great Barrier Reef (大堡礁) is a gift of        (大自然) .

The Great Wall is a       (標(biāo)志) of China.

The       (形勢(shì)) about the climate is a bit serious.

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