1. Bees (visit) ...................... 5,000,000 flowers to produce half a kilogram of honey.
2. I (lose) ................. my pen . I ccan't find it anywhere.
3. Nowadays a lot of important inventions (carry) ................. out by scientists working for large industrial firms.
4. The computer (invent) .................... long ago but it (bring) .........................people a lot of advantages.
5. The new commputer system (install) ....................... next month.
6. It's necessary (brush) .................... teeth after meals.
7. The family (sleep) ................... when the postman came yesterday.
cái này mới đúng
1. Bees (visit) ...........visit........... 5,000,000 flowers to produce half a kilogram of honey.
2. I (lose) ..........have lost....... my pen . I ccan't find it anywhere.
3. Nowadays a lot of important inventions (carry) ........are carried......... out by scientists working for large industrial firms.
4. The computer (invent) ..........was invented.......... long ago but it (bring) ..............has brought...........people a lot of advantages.
5. The new commputer system (install) .............will be installed.......... next month.
6. It's necessary (brush) ..........to brush.......... teeth after meals.
7. The family (sleep) ..........was sleeping......... when the postman came yesterday.
1. Bees (visit) ..........visit............ 5,000,000 flowers to produce half a kilogram of honey.
2. I (lose) ...........have lost...... my pen . I ccan't find it anywhere.
3. Nowadays a lot of important inventions (carry) ........are carried......... out by scientists working for large industrial firms.
4. The computer (invent) ...........was invented......... long ago but it (bring) ............was bringing.............people a lot of advantages.
5. The new commputer system (install) ............will be installed........... next month.
6. It's necessary (brush) .........to brush........... teeth after meals.
7. The family (sleep) ..........was sleeping......... when the postman came yesterday.