What good news! Such a successful gene ______ in pigs that it enables the pigs to produce human serum albumin, a protein made by the liver. Look! Here ________.
| A．have they modified…they come. |
| B．did they modify…come they |
| C．they have modified…are coming they |
| D．they modify…they are coming |
Every camera we sell in our shop comes with a two-year _______ .
| A．guarantee | B．safety | C．evaluation | D．instruction |
_______ not to drive after drinking, some drivers are still trying their luck, which is really dangerous.
| A．Being reminded | B．To remind |
| C．Having reminded | D．Reminded |
You should report any incident, _______ minor it is.
| A．whatever | B．whenever | C．however | D．wherever |
I had intended to go on a diet, but the dishes at the party were simply impossible to _______ .
| A．stand | B．resist | C．defend | D．tolerate |
Usually what weighs us down are not the burdens of life, but how we handle _______ .
| A．this | B．them | C．it | D．us |