—Susan ,you are doing worse. You have to _____more _____ your study than computer games.
—Yes. I must control myself.
| A．concentrate;on | B．decide;on | C．take;on | D．spend;on |
—Susan ,you are doing worse. You have to _____more _____ your study than computer games.
—Yes. I must control myself.
| A．concentrate;on | B．decide;on | C．take;on | D．spend;on |
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