Вставьте am, is или are.

Решение:

Вставляем подходящую форму глагола 'to be' (am, is, are) в зависимости от подлежащего.

1. The weather is nice today. (The weather — ед.ч.)
2. I am not rich. (I — первое лицо ед.ч.)
3. This bag is heavy. (This bag — ед.ч.)
4. These bags are heavy. (These bags — мн.ч.)
5. Look! There is Helen. (Helen — ед.ч.)
6. My brother and I are good tennis players. (My brother and I — мн.ч.)
7. Emily is at home. Her children are at school. (Emily — ед.ч.; Her children — мн.ч.)
8. I am a taxi driver. My sister is a nurse. (I — первое лицо ед.ч.; My sister — ед.ч.)