Chọn từ đúng: 1. Millions of cards ............... every year ( have sent/ are sent/ is sent ). 2. Jane saw her old friend while she ........... the street ( crossed/ is crossing/ was crossing/ crossen). 3. The garden ............ every morning is full of however ( water/ watered/ is watering/ waters). 4. They ........ cach other fover long time ( known/ knowning/ knew/ have known). 5. It 's ............. to learn English ( difficult/ difficutly/ more difficult ). 6. The said that we ............. cane and see you ( would/ will/ shall/ is ).

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