单词拼写（每小题1分，共5分）
根据句意，用所给动词的适当形式填空。
Winter is the best season             (go) skiing.
I often see my father         (read) the newspaper on the sofa.
It is very important for us             (exercise) more often.
The heavy rain prevents us from            (go) for a picnic.
Not only they but also Jim _______ (watch) the birds in Yancheng Nature Reserve now.